Like this topic? You may also like these photo galleries:

Tampa, Florida -- A mother struggled Tuesday to talk about the loss of her young son as Tampa police changed their investigation to how the child was allowed to walk into the street where he was struck by a vehicle.

Marterrance Albury, 4, died after being run over Sunday night at the intersection of Florida Avenue and 109th Avenue.

Police say after reviewing video from surveillance cameras along the street, they have determined that Marterrance, who lived in the apartment complex there, walked into the street and was hit by an SUV.

"He was just a very cheerful little boy. It's hard to talk about it," said Johntea Williams, Marterrance's mother.

GRAPHIC VIDEO WARNING: A dark green, possibly black, Ford Expedition may have struck Marterrance Albury in this video. It is not clear if this is a crime or a tragic accident. Please call Tampa Police at 813-231-6130 if you have any information.

Williams says she can't stop the tears.

"I know crying ain't going to bring him back," Williams said.

Police said Marterrance was killed Sunday night when he was ran over by what appears to be a 2001 to 2004, green Ford Expedition that is seen in surveillance video.

Police believe the boy walked out of his apartment and into the road while his 17-year-old brother, who was left in charge of the boy, was playing video games. Police say the teen is mentally challenged.

"He always watched him," Williams said.

Johntea Williams was getting her son ready for school, but now must prepare for his funerakl.

Williams says watching home videos is hard because Marterrance is no longer here.

She says instead of planning her son's first day of school, the family is planning his funeral, which is scheduled for 11 a.m. Aug. 2 at the Ray Williams Funeral Home, 301 N Howard Ave, Tampa.

Tampa Police say they have the key clue to solving the tragic death of a four-year-old boy.
WTSP

"I bought his school clothes. He was like school school school school. He was so eager," Williams said.

"His life was cut short. He could've been anything he wanted to be but somebody took his hopes and dreams away from him and from me it wasn't right," she said.

Williams says she went out with a friend the night her son was killed and returned at 4 a.m. Monday to learn that he was dead. She says her teenage son blames himself but she reassures him that's not the case.

Williams asks that anyone with information about the vehicle notify authorities. Anyone with a tip can call Tampa police at (813) 231-6130. Tipsters can remain anonymous by contacting Crime Stoppers at Crime Stoppers 1-800-873-TIPS (8477).